Baicheng Zhang, Yonghao Gu, Victor Manuel Freixas, Shichao Sun, Sergei Tretiak, Jun Jiang, Shaul Mukamel
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引用次数: 0
Abstract
Dendrimers are branched polymers with wide applications to photosensitization, photocatalysis, photodynamic therapy, photovoltaic conversion, and light sensor amplification. The primary step of numerous photophysical and photochemical processes in many molecules involves ultrafast coherent electronic dynamics and charge oscillations triggered by photoexcitation. This electronic wavepacket motion at short times where the nuclei are frozen is known as attosecond charge migration. We show how charge migration in a dendrimer can be manipulated by placing it in an optical cavity and monitored by time-resolved X-ray diffraction. Our simulations demonstrate that the dendrimer charge migration modes and the character of photoexcited wave function can be significantly influenced by the strong light-matter interaction in the cavity. This presents a new avenue for modulating initial ultrafast charge dynamics and subsequently controlling coherent energy transfer in dendritic nanostructures.
树枝状聚合物是一种支化聚合物,在光敏化、光催化、光动力疗法、光电转换和光传感器放大等方面有着广泛的应用。许多分子中许多光物理和光化学过程的主要步骤都涉及光激发引发的超快相干电子动力学和电荷振荡。这种在原子核凝固的短时间内发生的电子波包运动被称为阿秒电荷迁移。我们展示了如何通过将树枝状聚合物置于光腔中并利用时间分辨 X 射线衍射来监测其电荷迁移。我们的模拟结果表明,树枝状聚合物的电荷迁移模式和光激发波函数的特性会受到空腔中强烈的光-物质相互作用的显著影响。这为调控树枝状纳米结构中的初始超快电荷动力学和随后控制相干能量转移提供了一条新途径。
期刊介绍:
The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.